| 摘要 |
Blood glucose levels of a person are determined by a device (1) which provides a changing light pattern which changes in regard to one or several parameters defining its luminance, color, rate of flicker, spatial contrast, detail content, speed, or otherwise, provided that the change gradually stimulates one retinal system more than another retinal system. A person observes the changing light pattern until a subjective visual effect occurs, which is preferably an observer that perceives dramatic change in the appearance of the light pattern, for example, a change in the perceived direction of rotation. The subjective visual effect indicates a specific ration of stimulation of the two retinal systems, for example, the point of balanced stimulation of the two systems. Upon noting the subjective visual effect, the patient actuates a mechanism (4, 5) which parameter values with a corresponding blood glucose level using predetermined calibration data. Thereby, the person's glucose level is accurately determined in a completely non-invasive manner.
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